期刊
TALANTA
卷 221, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.talanta.2020.121621
关键词
Ratiometric fluorescent probe; Copper nanoclusters; Aggregation induced emission enhancement; Imaging of bacterial metabolism
资金
- National Nature Science Foundation of China [51861145311, 21174048]
- Program of Jilin Provincial Department of Science & Technology, China [20180520010JH]
- Industrial Technology Research and Development Project of Jilin Province Development and Reform Commission China [2019C050-10]
The novel dual-emission pH-response bacterial metabolism detection and imaging probe utilizes different fluorescence intensities for visual pH detection, enabling high signal-to-noise ratio detection of bacterial metabolism and metabolic imaging.
The profiling of bacterial metabolism is of great significance in practical applications. Therefore, the development of ultrasensitive and highly selective probe for bacterial metabolism detection and imaging is extremely desirable. Herein, a novel dual-emission pH-response bacterial metabolism detection and imaging probe is successfully developed. This probe consists of large-sized and easily separated SiO2 microspheres, copper nanoclusters (Cu NCs) with red emission, and carbon dots (CDs) with blue emission through in-situ self-assembly. In this system, the fluorescence of Cu NCs is sensitive to pH change due to their obvious aggregation-induced emission enhancement (AIEE) property, while the blue fluorescence of CDs remained almost stable. Therefore, red fluorescence and blue fluorescence are compounded with different fluorescence intensity at different pH values, and their fluorescence ratio is also different. By observation of composite fluorescence color, the visual colorimetric pH detection can be realized with the change of pH value of 0.2 units. Utilizing this system, we are able to detect bacterial metabolism with high signal-to-noise ratio, and it can also be used for bacterial metabolic imaging. Therefore, the pH-responsive Cu NCs-based dual-emission ratiometric fluorescent probe we constructed can provide new ideas for bacterial detection, antimicrobial sterilization, and biological imaging.
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